Reversing-valve.



H. E. SGHILD. REVERSING VALVE.

APPLICATION FILED 11211.21, 1911.

1,000,629. Patented Aug. 15, 1911.

3 SHEETS-SHEET l.

WITNESSES: I I 1 INVENTOR.

W a; @1 2M1 vw M22 4 1/4. I A! ATTORNEY.

COLUMBIA PLANOGRAPH co., WASHINGTON, 1) c.

H. E. SGHILD.

' REVERSING VALVE.

APPLICATION FILED APB.21, 1911.

1,000,629, Patented Aug. 15, 1911.

3 SHEETS-SHEET Z.

WITNESSES: INVENTOR ZAWMM. ,4

ATTORNEY H. E. SGHILD.

BEVERSING VALVE. APPLICATION FILED 1:11.21, 1911.

Patented Aug. 15, 1911.

3 SHEETS-SHEET 3.

IIVVENTOR. J4 8 PM BY a /v. M x

I I I II- 70 FFTQ.

HERMANN E. SGHILD, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TOTHE S. R. SMYTI-IE COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OFWEST VIRGINIA.

REVERSING-VALVE.

To all whom it may concern:

Be it known that I, HERMANN E. SOHILD, a citizen of the United States,residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented new and useful Improvements in ReversingValves, of which the following is a specification.

My invention relates to gas reversing valves designed particularly foruse with regenerative furnaces, and is an improvement on the reversingvalve described and claimed in Letters Patent No. 804,505 granted. to meNovember 14, 1905.

The object of the present invention is to bring all the elements of areversing valve into a unit, whereby the various connections can beaccomplished by the rotation of a single structure, eflecting aconsiderable saving in space and cost.

Referring to the accompanying drawings, Figure 1 is a plan of myimproved reversing valve with the valve f and the valve-chamber Fremoved. Fig. 2 is a horizontal section on the line IIII of Figs. 3 and4.

Figs. 3 and 4 are vertical sections on the lines III-III and IVIV,respectively, of Figs. 1 and 2, Fig. 4 showing the air-valve mechanismin end elevation. Fig. 5 is a plan of the base-plate, and the passagesbeneath the level thereof. Fig. 6 is a vertical section on the lineVIVI, Fig. 5.

A horizontal base-plate A of iron or steel is mounted on a suitablefoundation or substructure B and has therein the central circular portor opening a surrounded by the four ports or openings (4, a a a equallydistant from the opening a. The opening a is diametrically opposite theopening (1*, and the opening a is diametrically opposite the opening aThe openings (1 and a are sixty degrees apart, as also are the open-,ings a and a leaving one hundred and twenty degrees between the openingsa and a and between the openings a and a The sub-structure B has thecentral stack flue 6 leading from the opening a downwardly and thenhorizontally, and the four flues b, 6 b 6* leading respectivelydownwardly and then horizontally from the openings a, a a a The circularhorizontal water-pan or water-cooled valve-plate G is seated on thebase-plate A and is in axial alinement with the center of the openingI). The pan G Specification of Letters Patent.

Application filed April 21, 1911.

Patented Aug. 15, 1911. Serial No. 622,479.

has an annular depending hub c" fitting in an annular depression in theplate A to prevent the pan from sliding out of said axial alinement. Thepan C has five upwardly flanged openings 0, 0, c c 0 0 0 arranged sixtydegrees apart, the opening 0 permanently registering with the opening a,and four of the openings 0, c c 0 0 0 registering at a time with theopenings a, a a a as will be explained presently. The pan C has an outerupstanding flange 0 which with the flanges aforesaid form a water pan tokeep the pan and adjacent parts from burning out.

The pan C has therein the short radial ribs 0 extending inwardly fromthe outer flange c and upwardly slightly from the bottom of the pan. Onthese ribs rests the lower edge of the hood D, which is, in general,dome-shaped, its lower edge resting beneath the surface of the water inthe pan to form a gas-seal. The hood has the opening 03 centrally overthe opening a; the openings d and 0Z in the form of tubes surroundingthe flanges of the openings 0 and 0 respectively, and having their innerportions resting on the ribs 0 below the water in the pan C. The upperends of the tubes (Z and 65 open into the external atmosphere. The hoodD has another opening or tubed", having its lower end surrounding theflange of the opening 0 and resting on the ribs 0 and 0 below the waterlevel in the pan C.

On the hood D, I place the box E having a central bottom opening 6registering with the opening d; an opening 6 registering with the upperend of the tubular opening 6Z4, and a central upper opening 6 in axialalinement with the openings a, o, o, and d. Normally the opening 6 isclosed by the cover 01 The opening 6 is surrounded by two concentricflanges forming a watertrough, into which the lower edge of the flange fof the gas-chamber F extends to form a gas-seal. The bottom plate f ofthe chamber F is provided with the valve seat or opening f centrallyover the opening 6.

f is a valve suspended from the reciprocable stem 7", by which the flowof gas through the opening f may be regulated or stopped. The chamber Fis stationary and rests on the beams f supported on the posts f.

A horizontal rock-shaft g has bearings in the ears f on the bottom f andis provided with a central arm 9, to which is secured the chain 9 forraising, lowering, and holding the said arm. The ends of the shaft 9 areprovided with the arms 9 and 9 connected to the valves or covers g andg? by the links 9 The cover 9 is centrally over the opening (Z when theparts are as shown on the drawing; and the cover 9 is centrally over theopening 6Z5 when the pan O and parts supported thereby have been rotatedsixty degrees in the direction indicated by the arrow h, Figs. 1 and 2.The pan C may be rotated by various means but I have shown the worm Igearing with teeth on the periphery of the pan. The worm is mounted onthe shaft 2' driven by any suitable mechanism.

The parts being as shown on the drawings, gas passes from the chamber F,connected to any suitable source of gas-supply, through the valveopening f, the opening 0, the gasbox E, the openings 6 6Z a and a to theflue 79 which, we may assume, conducts the gas to the gas side of a hotregenerator chamber, whence it passes to a furnace, in which it isburned with air which, flowing through the openings 62?, c and a passesinto the flue Z2 leading to the air side of the regenerator chamber andthence, it is assumed, to the furnace. The waste gases pass from thefurnace through another set of regenerators from which the gases returnto the hood D in two paths, one path being through the flue b, theopenings a and 0, and the other path being through the flue b and theopenings a and 0 From the hood D the waste gases pass to the stack-fluethrough the openings 0 and a. The elongated arrows on Figs. 1-4L showthe direction of the air, gas, and waste. gases.

When it is desired to reverse the flow of the air and gases, the shaft iis actuated to rotate the pan C and parts supported thereby sixtydegrees with the arrow h, whereupon the opening 0 registers with theopening (1. the opening 0 with the opening a, the opening 0 with theopening 01?, the opening 0 with the opening a, and when the opening 0passes on to a dead or closed space on the plate A between the openingsa and a and the opening 0 passes on to a dead or closed space on theplate A between the openings a and a the air tube d passes underneaththe cover g and the air-tube d passes from under the cover It will beseen that the gas now passes as before through the opening 0 from whichit enters the flue b and that the air passes down the air-tube (Z5 andthrough the openings 0 into the flue b. The air and gas after beingburned in the furnace return to the dome D as waste products by way ofthe flues b and 5 From the dome the waste gases enter the stack-openingc and the stack-flue b. By returning the parts to the positions shown onthe drawings the gases will be again reversed soas to assume theirformer courses. 9 9 may, by the chain 9 be adjusted up or down toregulate the supply of air.

In case it is desired to heat the stack on starting the furnace andregenerato-rs, the cover d may be removed from the opening 6 by removingthe cover 6 from the end of the box E and insertinga suitable tool. Thegas can then pass directly from the box E into the hood D and thenceinto the stack-flue b where it is burned to preheat the stack.

The gas passages c d 6*, e, f, register with the flue b or b theair-tube (Z registers with the flue 6 or the air-tube d registers withthe flue Z2; and the stack-flue communicates with the flues b and 6 orthe flues b and b the flues bb*, when acting as waste-flues,communicating with vthe. chamber within the hood or dome D.

I claim- 1. In a reversing valve, a rotary valve-.

plate having a central stack-port and a circular series of six portsarranged 60 apart around the stack port, a hood connected gastight tothe valveplate and inclosing the stack-port and the alternatev ports ofthe said six ports, a gas-supply passage connected to one of theremaining ports in the valve-plate, and an air-supply tube connected toeach of the two remaining ports in the valve plate, a stack registeringwith the stack port, a pair of convertible air and waste flues 60 apart,and a pair of convert- The valves or covers ible gas and waste flues 60apart and diametrically opposite the air and waste flues, one of theair-ports and the intermediate waste-port registering with the air andwaste fines, and the gas passage and one of the remaining waste-portsregistering with the gas and waste flues, and means for rotating thevalve-plate.

2. In a reversing valve, a stack flue, a

pair of convertible air and waste fines and a pair of convertible gasand waste flues arranged around the stack flue, a rotary valve-platehaving a central waste-port, a pair of air ports, a gas-port, and wasteport-s between the air-ports, and between each airport and the gas-port,the ports being spaced so that, when one of the airports registers withone of the air and waste flues, the intermediate waste-port registerswith the remaining air and waste flue, and, when the gas-port registerswith one of the gas and waste flues, one of the waste-ports at eitherside of the gas-port registers with the remaining gas and waste flue, ahood connected gas-tight to the valve-plate and inclosing thewaste-ports and the stack-port,

a gas-supply passage connected to the gasport, an air-tube connected toeach air-port, and means for rotating the valve-plate.

3. In a reversing valve, a pair of convertible air and waste fines and apair of convertible gas and waste fines, a stack flue centrally arrangedwith respect to the said pair of fines, a valve-plate having rotationtransversely of said fines a hood sealed to the valve-plate and coveringthe stack flue, and means to oscillate the valve-plate to two positionsthe hood and valve-plate having passages disposed to admit airalternately to the said air-fines at the two said positions of thevalve-plate, the valve-plate having openings disposed so as to lead thewaste-gases alternately from the waste-gas fines to the interior of thehood at the two said positions of the valve-plate, and the valve-plateand hood having a gas inlet disposed so as to admit gas alternately tothe gas fines at the two said positions of the valve-plate.

Signed at Pittsburg, Pa., this 19th day of April, A. D. 1911.

HERMANN E. SCHILD.

Witnesses:

ALICE E. DUFF, F. N. BARBER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

